Barday, R.; Kamps, T.; Neumann, A.; Rudolph, J.; Schubert, S.: Instrumentation Needs and Solutions for the Development of an SRF Photoelectron Injector at the Energy-Recovery Linac BERLinPro. In: Michaela Marx ... [Ed.] : 10th European Workshop on Beam Diagnostics and Instrumentation for Particle Accelerators, DIPAC2011, Hamburg, Germany, May 16 - 18, 2011Hamburg: DESY, 2011, p. 317-319
Abstract:
BERLinPro is an energy-recovery linac for an electron beam with 1mmmrad normalized emittance and 100mA average current. The initial beam parameters are determined by the performance of the electron source, an SRF photo-electron injector. Development of this source is a major part of the BERLinPro programme. The instrumentation for the first stage of the programme serves the purpose to have robust and reliable monitors for fundamental beam parameters like emittance, bunch charge, energy and energy spread. The critical issue of the second stage is the generation of an electron beam with 100mA average current and a normalized emittance of 1mmmrad. Therefore we plan to setup a dedicated instrumentation beam line with a compact DC gun to measure thermal emittance, current and beam lifetime. In parallel an SRF gun with dedicated diagnostics will be build focused on ERL specific aspects like emittance compensation with low energy beams and reliability of high current operation. This paper collects requirements for each development stage and discusses solutions to specific measurement problems.